The unidentified suspect who killed a pregnant woman in Brooklyn, N.Y. on Saturday left a note under the victim’s body saying that more pregnant women would be killed unless convicted D.C. sniper Lee Boyd Malvo is released from prison, according to the New York Post.

The Post, citing law enforcement sources, says the note was typed in large block letters on a computer-printed page.

The note was found on Vindalee Smith, 38, who was found dead on the floor of her home in the East Flatbush section of Brooklyn on Saturday. Her unborn child did not survive.

According to the Asssociated Press, the note read: "I will kill 1 pregnant woman a month starting now until Lee Boyd Malvo is set free!" It was signed "the apprentice" with a smiley face.

It's not clear what, if any, relevance the note had to the death of Smith. Investigators are trying to determine whether it represented legitimate evidence or a ruse meant to throw them off track.

Neighbors said she had moved into the area in recent weeks. Her other children are older and did not live with her.

Police said there was no sign of forced entry, and no weapon was recovered. Investigators were looking for a possible suspect and spoke to Smith's fiance as well as friends and family.

The Post reports that police believe the letter may be a red herring designed to confuse police.

Smith had once feuded with a former neighbor who threatened to kill her, but it was months ago and the trouble had stopped when she moved to the new apartment, the Rev. Ferron Francis told the Daily News.

On Sunday, police tape blocked off the street to keep people away from the brownstone home.

Smith was a devout Seventh-day Adventist and attended New Dimension Church, about half a block from her residence.

The brutal, unexpected death "is tragic, it has broken our hearts," Francis said.

Smith had joined the church about three years ago, said Andrew Connor, a deacon at New Dimension.

"She was dedicated to her family," he said. "She was beautiful and this is very surreal."

Malvo was 17 when he went on the cross-country killing spree with John Allen Muhammad.

The pair was linked to 27 shootings across the country, including 10 fatal attacks in the Washington area. Malvo is serving a life sentence with no parole in Virginia.

Muhammad was executed in Virginia in 2009. Malvo testified that a second phase of the plan included shooting a pregnant woman.